Hook base



FIG. 1 is a perspective view of a hook base showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a top side elevational view thereof, the bottom side elevational view thereof is identical; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view thereof is identical.

The hook and attachment holes are shown in broken lines for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a hook base, as shown and described. 